rs121918527
Variant summary
Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM2PM5PP3_ModeratePP5
The NM_031407.7(HUWE1):c.12559C>T(p.Arg4187Cys) variant causes a missense change. The variant allele was found at a frequency of 0.000018 in 111,071 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R4187S) has been classified as Likely pathogenic.
Frequency
Consequence
NM_031407.7 missense
Scores
Clinical Significance
Conservation
Publications
- intellectual disability, X-linked syndromic, Turner typeInheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Illumina, Ambry Genetics, G2P
- non-syndromic X-linked intellectual disabilityInheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
- syndromic intellectual disabilityInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
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ACMG classification
Our verdict: Likely_pathogenic. The variant received 7 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| HUWE1 | NM_031407.7 | c.12559C>T | p.Arg4187Cys | missense_variant | Exon 81 of 84 | ENST00000262854.11 | NP_113584.3 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| HUWE1 | ENST00000262854.11 | c.12559C>T | p.Arg4187Cys | missense_variant | Exon 81 of 84 | 1 | NM_031407.7 | ENSP00000262854.6 |
Frequencies
GnomAD3 genomes AF: 0.0000180 AC: 2AN: 111071Hom.: 0 Cov.: 22 show subpopulations
GnomAD4 exome Cov.: 28
GnomAD4 genome AF: 0.0000180 AC: 2AN: 111071Hom.: 0 Cov.: 22 AF XY: 0.00 AC XY: 0AN XY: 33303 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
Intellectual disability, X-linked syndromic, Turner type Pathogenic:3
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Criteria applied: PS2_MOD;PS4_MOD,PM5,PS3_SUP,PM2_SUP,PP1,PP2 -
not provided Pathogenic:2Uncertain:1
In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Experimental studies have shown that this variant affects HUWE1 protein function (PMID: 29118367). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt HUWE1 protein function. ClinVar contains an entry for this variant (Variation ID: 10678). This variant is also known as c.12229C>T (p.R4077C). This variant has been observed in individual(s) with intellectual disability (PMID: 18252223, 19377476). This variant is not present in population databases (ExAC no frequency). This sequence change replaces arginine with cysteine at codon 4187 of the HUWE1 protein (p.Arg4187Cys). The arginine residue is highly conserved and there is a large physicochemical difference between arginine and cysteine. -
Identified in multiple male family members with intellectual disability in published literature (PMID: 18252223); Published functional studies demonstrate a damaging effect on protein function (PMID: 28445732, 34314700); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 19377476, 23871722, 29180823, 29307790, 27130160, 29118367, 33948573, 32336296, 34314700, 28445732, 36111624, 37167062, 38021253, 18252223) -
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Non-syndromic X-linked intellectual disability Pathogenic:1
A hemizygous missense variant was identified, NM_031407.6(HUWE1):c.12559C>T in exon 81 of 84 of the HUWE1 gene. This substitution is predicted to create a major amino acid change from an arginine to a cysteine at position 4187 of the protein, NP_113584.3(HUWE1):p.(Arg4187Cys). The arginine at this position has very high conservation (100 vertebrates, UCSC), and is located within the HECT domain. In silico software predicts this variant to be damaging (Polyphen, SIFT, CADD, Mutation Taster) and the variant is not present in the gnomAD population database. It has been previously reported in patients with X-linked intellectual disability (ClinVar; Hu, H. et al. (2016)). It has also been shown to segregate with disease in one family (Froyen, G. et al. (2008)). In addition, functional studies showed decreased DNA repair capacity and hypersensitivity to oxidative stress in patient lymphoblastoid cells (Bosshard, M. et al. (2017)). A different variant in the same codon resulting in a change to a histidine has been reported as likely pathogenic (ClinVar; Niranjan, T. et al. (2015)). Based on information available at the time of curation, this variant has been classified as PATHOGENIC. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at